import random

import pygame

# 初始化 Pygame
pygame.init()

# 定义颜色
white = (255, 255, 255)
yellow = (255, 255, 102)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 游戏窗口尺寸
width = 600
height = 400

# 创建游戏窗口
game_display = pygame.display.set_mode((width, height))
pygame.display.set_caption('PopYu Snake')

# 设置游戏时钟
clock = pygame.time.Clock()

# 蛇的初始长度
snake_block = 10
snake_speed = 15

# 字体设置
font_style = pygame.font.SysFont("bahnschrift", 25)
score_font = pygame.font.SysFont("comicsansms", 35)


def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, black, [x[0], x[1], snake_block, snake_block])


def your_score(score):
    value = score_font.render("Scrore: " + str(score), True, black)
    game_display.blit(value, [0, 0])


def message(msg, color, x, y):
    mesg = font_style.render(msg, True, color)
    game_display.blit(mesg, [x, y])


def draw_buttons():
    pygame.draw.rect(game_display, red, [width / 6, height / 2, 100, 50])  # Quit按钮
    pygame.draw.rect(game_display, green, [width * 2 / 3, height / 2, 100, 50])  # Restart按钮
    message("Quit", white, width / 6 + 20, height / 2 + 10)
    message("Restart", black, width * 2 / 3 + 5, height / 2 + 10)


def gameLoop():
    game_over = False
    game_close = False

    # 蛇的初始位置设置
    x1 = width / 2
    y1 = height / 2
    x1_change = 0
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

    while not game_over:

        while game_close:
            game_display.fill(blue)
            message("You Lost! Press C to Play Again or Q to Quit!", red, width / 6, height / 3)
            your_score(Length_of_snake - 1)
            draw_buttons()  # 画按钮
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    game_over = True
                    game_close = False
                if event.type == pygame.MOUSEBUTTONDOWN:  # 检测鼠标点击
                    mouse_x, mouse_y = pygame.mouse.get_pos()
                    # 检测是否点击了退出按钮
                    if width / 6 <= mouse_x <= width / 6 + 100 and height / 2 <= mouse_y <= height / 2 + 50:
                        game_over = True
                        game_close = False
                    # 检测是否点击了重新开始按钮
                    if width * 2 / 3 <= mouse_x <= width * 2 / 3 + 100 and height / 2 <= mouse_y <= height / 2 + 50:
                        gameLoop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        if x1 >= width or x1 < 0 or y1 >= height or y1 < 0:
            game_close = True

        x1 += x1_change
        y1 += y1_change
        game_display.fill(blue)
        pygame.draw.rect(game_display, green, [foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        our_snake(snake_block, snake_List)
        your_score(Length_of_snake - 1)

        pygame.display.update()

        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0
            Length_of_snake += 1

        clock.tick(snake_speed)

    pygame.quit()
    quit()


gameLoop()
